Charles h



(No Model.) G. H. NEWBURY.

ELECTRIC HEATER.

No. 524,646. Patented Aug. 14, 1894.

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FNITE'D STATES PATENT ()rrrcn.

CHARLES H. NEWBURY, OF' ST. PAUL, MINNESOTA, ASSIGNOR OF ONE-HALF TOJOHN J. BORUM, OF SAME PLACE.

ELECTRIC HEATER.

SPEGIFICATION forming part of Letters Patent No. 524,646, dated August14, 1894, Application filed April 19, 1894- Serlal No. 503| (N mod l- ToaZZ whom it may concern;

Be it known that I, CHARLES H. NEWBURY, a citizen of the United States,residing at St. Paul, in the county of Eamseyand State of Minnesota,have invented new and useful Improvements in Electric Heaters, of whichthe following is a specification.

My invention relates to electrical heating apparatus the purpose thereofbeing to provide a simple, novel and economical mechanism in, or bymeans of which, radiant heat may be generated by the incandescence ofone or more filaments, or wires.

The special object of my present invention is to provide simple andnovel means for supporting and insulating the incandescing filament, orwire, arranged within the casing of the heater, to simplify theconstruction and reduce the cost of the supporting devices, and toenable the wire to be positively secured thereby without twisting, orbending the same.

My invention consists, therefore, in the novel features of constructionand new combinations of parts hereinafter fully described and then moreparticularly pointed out and defined in the claims.

For the purposes of the following description I will refer to theaccompanying drawings, in which- Figure 1 is a plan View showing one ofthe parts composing the shell, or casing, of the heater. Fig. 2 is atransverse section of the same. Fig. 3 is a detail view showing theconstruction of one of the glass plugs used in sustaining theincandescing wires, or filaments, within the casing.

The reference-numeral 1 in said drawings indicates the shell, or casing,of the heater, which is preferably formed in two parts, each constructedof any suitable material, such as metal, glass, or both combined, orwood, or vulcanized rubber, suitably lined. Each part is of greaterlength than width, and is concavo-convex, in cross section, its depthbeing comparatively shallow The two parts are united with their concavefaces adjacent, and are fastened together in any preferred man nor,bolts or rivets being preferred, in order that access may be had to theinterior. Aconvenient form of fastening is to employ tiebolts 2, whichare passed through openings 3.

Suitable perforations may also be provided for the admission offastenings by which the casings may be secured in position, as, forexample, beneath the seats.

When the casing is made of glass, a frame of iron, or other metal, isused in which the glass is supported, the latter being usually providedwith openings,or perforations,which allow the-heated air to escape fromthe inte- 6o rior of the casing. Should the latter be constructed ofiron instead of glass, these perforations will be unnecessary. In eithercase,

I prefer to leave the. bottom of the casing open, in order that accessmay be had to the interior without taking the casing apart. When theheater is in use, the open side, or bottom, rests upon, or very near,the floor of the car, which practically closes the opening. Smallfoot-supports 4 are provided to sustain the casing, and to serve asfastenings for the same, each being provided with an opening to receivea screw which is driven into the wood of the floor, or other structure,on which the casing may be mounted.

Within the shell, or casing 1 is arranged a wire, or filament 5, ofsuitable material such as platinum, carbon, or other material ofieringsuch a degree of resistance to the passage of the current as to produceand maintain incandescence. This filament is preferably arranged in theform of a double loop within the casing, bearing a general resemblanceto the letter U, the terminals 6 being led to a cut-off, switch, orsafety-fuse, the precise con- 8 5 struction of those parts forming nopart of my invention. \Vithin the casing are arranged plugs, for thesupportof the incandescing filament. These plugs consist of short,straight bars '7, having cross-heads 8, of suitable di- 0 mensions,provided with half-round notches, or seats 9, formed in the straightedges of the cross-heads. The ends of the bars 7 are inserted inapertures in the opposite parts of the casing, nipples, or shoulders 10,being pro- 5 vided in the interior to aid in supporting the plugswithout play. The size of the latter is such that their edges in whichthe half-round notches 9 are formed coincide, substantially, with theabutting edges of the two parts of the casing. The plugs are mounted inboth these parts and are arranged opposite each other, so that when thetwo halves of the easing are united the notched edges of the plugs willbe brought into juxtaposition and the half-round notches 9 in one plugregister with those in the opposite plug, forming round, or nearlyround, openings in which the Wire or filament 5 is confined. \Vhen thecasing is formed of glass, the plugs may be made of iron, or othermetal, as they will be insulated by being mounted in the thick glass ofthe casin g. When the latter is constructed, either wholly or in part,of iron,or other metal having conductivity, the plugswill be made ofglass, and if preferred they may be of glass in all cases.

I have already stated that the parts composing the casing areeoncavo-convex,in cross section, or substantially so, but they may berectangular, if preferred.

The wires 12, which connect with the ter-' minals of thefilamentsfiareheavilyinsulated and arranged where none butthe properpersons canhave access to them. A switch of ordinary form is arranged atone end of the "car where it can be readily operated to open enclose thecircuit, as required.

What I claim is-' 1. A support for the incandescingiilamcnt of-anelectric heater, composed-of two similar parts, each consisting oi. abar having a cross head the edge of which is provided with half roundseats adapted to register with those in the other similar part to formsubstantially circular openings for said filaments, and perforatedsupports adapted to receive and hold said parts in juxtaposition,substantially as described.

2. A shell or casing for an electric heater formed in two similarparts,a double filament arranged between said parts, its terminals emerging atone end of the casing, glass plugs consistingof bars having cross-headsand arranged Within the casings, the edges of the cross-heads beingprovided with half-round seats for the wire, and the plugs in one partof the casing being arranged opposite those in the other part, wherebythe notched edges are brought into juxtaposition and the halfroundnotches caused to register and form round'openings for the filament,substantially as described.

In testimony whereof I have hereunto set my hand and alfixed my seal inpresence of two subscribing Witnesses.

7 CHARLES H. NEWBURY.

Witnesses:

J. W. PINOH, H. W. ADAMS.

